Resolves an issue with nanoscroller and initially hidden content

app/views/editor/level/edit.coffee

@@ -113,6 +113,7 @@ module.exports = class EditorLevelView extends View
     button.find('> span').toggleClass('secret')
     
   toggleTab: (e) ->
+    @renderScrollbar()
     return unless $(document).width() <= 800
     li = $(e.target).closest('li')
     if li.hasClass('active')

app/views/editor/level/thangs_tab_view.coffee

@@ -114,10 +114,6 @@ module.exports = class ThangsTabView extends View
     @addThangsView = @insertSubView new AddThangsView world: @world, supermodel: @supermodel
     @buildInterface() # refactor to not have this trigger when this view re-renders?
 
-  renderScrollbar: ->
-    @$el.find('.nano').nanoScroller()
-    @$el.find('.nano-pane').css({'display': 'block'})
-
   onFilterExtantThangs: (e) ->
     @$el.find('#extant-thangs-filter button.active').button('toggle')
     button = $(e.target).closest('button')

app/views/kinds/CocoView.coffee

@@ -118,7 +118,8 @@ module.exports = class CocoView extends Backbone.View
     @renderScrollbar()
 
   renderScrollbar: ->
-    @$el.find('.nano').nanoScroller()
+    #Defer the call till the content actually gets rendered, nanoscroller requires content to be visible
+    _.defer => @$el.find('.nano').nanoScroller()
 
   updateProgress: (progress) ->
     @loadProgress.progress = progress if progress > @loadProgress.progress

app/views/kinds/RootView.coffee

@@ -35,10 +35,6 @@ module.exports = class RootView extends CocoView
     $el ?= @$el.find('.main-content-area')
     super($el)
 
-  renderScrollbar: ->
-    $('.nano-pane').css('display','none')
-    $ -> $('.nano').nanoScroller()
-
   afterInsert: ->
     # force the browser to scroll to the hash
     # also messes with the browser history, so perhaps come up with a better solution